<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>04_流程控制</title>
</head>
<body>
<script>
    //1.顺序结构
    console.log("1")
    console.log("2")
    console.log("3")

    //2.分支结构
    let uname = '';
    if (!uname) {
        //alert('请先登录')
    } else {
        //alert('登录成功')
    }

    //3.选则分支
    let gender = 0;
    switch (gender) {
        case 0:
            console.log('性别女');
            break;
        case 1:
            console.log('性别男');
            break;
        default:
            console.log('没有这个性别');
    }
    //4.循环结构
    let names = ['张三', '李四', '王五'];
    for (var i = 0; i < names.length; i++) {
        console.log(names[i])
    }
    console.log("循环结束")
    console.log(i)


    //5.增强for循环
    for (let name of names) {
        console.log(name)
    }












































</script>
</body>
</html>